Quantitative Aptitude - Arithmetic Ability Questions

Two buses are moving towards each other with speed of 20 km/hr and 34 km/hr respectively. What will be the distance (in metres) between the two buses one second before they collide?

If P = 99, then the value of P(P2+ 3P + 3) is

The areas of a circle and square are equal. What is the square of the ratio of length of diameter to the length of diagonal?

The angle of elevation of the top of a tower from a point A on the ground is 30°. On moving a distance of 20 metres towards the foot of the tower to a point B, the angle of elevation increases to 60°. The height of the tower in meters is

When a number is increased by 21, it becomes 114% of itself. What is the number?

p3 + q3 + r3 – 3pqr = 4. If a = q + r, b = r + p and c = p + q, then what is the value of a3 + b3 + c3 – 3abc?

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

If a : b is 32 : 35 and b : c is 21 : 32, then a : c is?